Machine for kneading and grinding paper-making materials.



, 0. WURSTER. MACHINE FOR KNEADING AND GRINDING PAPER MAKING MATERIALS.

APPLICATION FILED OUT. 4, 1909.

958,901 Patented May 24, 1910.

2 SHEETS-SHEET l.

\A/ITNES'EES INVENTUR m 4 Casimir Wurster I. I. mowL. it 2i G. WURSTER. MACHINE FOR KNEADING AND GRINDING PAPER MAKING MATERIALS.

APPLICATION FILED OCT. 4, 1909.

4 Patented May 24, 1910.

2 SHEETS-SHEET '2.

a I i i? u L INVENTU Casimir Wurster Y A'TTCI NEYs \A/mJ ESSES I. of. mad.

CASIIIB WUBSTEB, 01' 13mm, GERMANY.

ncnnm FOR KNEADING AND GRINDING PAPER-MAKING MATERIALS.

Specification of Letters Patent.

Patented May 24,1910.

Application flled'october 4, 1908. Serial No. 520,892.

To wlwm it may concern:

Be it known that I, CABIMIR Wuns'rnn,

chemist, a subject of the German Emperor,

residin at 130 Chausseestrasse, Berlin, Germany, ave invented certain new and useful Im rovements in Machines for Kneadi anti Grinding Pa er-Making Materials; 2125 I do hereby dec are the following tobe a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to a machine for kneading and grinding paper-making materials in which one or more shafts rovided with kneading-propellers or grin ing disks revolve in a trough.

My. invention has for its object to remove certain defects in the working of machines of the abovesaid kind more especially to obviate the caking of the material in the kneading trough and thereby to diminish the friction between the kneading or grinding parts and the consequent heating of these parts. This is done by using an open kneading trough in which partitions are arranged to prevent the material from being thrown toward the outlet too soon, before it is sufi'lciently broken up. These partitions m3 if deslr be made movable and adjustable 2, b b are two shafts adapted to rotate in a F trou h a. Kneadin or grinding parts 0 are xed on the sha ts b, said parts having the form of disks provided with projections. The trough a is open at the top along its whole length and carries an extension (1 in which the partition gates f are arran ed. The partition gates d are movable in gui ing slots e and reach own fairly between the kneading disks. The partition gates are made vertically adjustable by screw bolts 9 provided with thumbnuts and reaching through transverse bars arranged on the extension d of the trough. The partition gates ma also be made laterally adjustable. This is one in the present case by providing two or more adjacent guiding slots e for each partition.

In. the modification shown in Fig. 3 the grinding disks or kneading propellers c fixed on the shafts 5,, b overlap, and the lower edges of the partitions f are therefore cut away alternately. On the sides of the trough ribs 2' and i are arranged alternately, so as to form partitions between each pair of propellers in continuation of the movable partition gates arran ed in the upper extension of the trough. ach rib surrounds only one shaft and leaves the other free. Similar ribs have been heretofore employed in machines of this kind, they have however proved especially useful in combination with the above described movable partitions and an open trough in preventing the material from being moved forward toward the outlet too quickly.

- In the machines hitherto used for kneading or grinding the paper-making material, closed troughs had to be employed for the reason that in troughs open at the top the material was not subjected long enou h or completely enough to the action 0 the kneading or grindin parts. Larger pieces of paper or lumps 0 material being heavier were thrown toward the outlet sooner than the completely kneaded or ground up material with the result that the pulp contained larger pieces of uncleared material, and was not fit for use in the vats. In closed troughs however the friction of the kneading parts is liable to become very high especially when ever the material is drier than usual. The pulped up material then cakes strongly together, especiallyin the back part of the a machine, and thereby produces increased friction of the grinding parts and consequent heating and consumption of power by the machine. Bags and pieces of string and the like impurities which are contained in considerable quantity in the so called sorted wastepaper also helped to increase the resistance of the material in the machines hitherto used as they clogged the grinding parts and could only be removed by. frequent opening and thorough cleanin of the machine. These defects of the 01 or constructions are obviated by the present invention. Owing to the arrangement of retaining partitions the trough may be made open along the whole or part of its length. Durascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. A kneading or grinding machme comprising an open trough, one or two shafts adapted to rotate in said trough and provided with kneading or grindlng elements an upward extension on said trough an partition ates or sluices 1n sa d extension reachin downward between said kneading or grin ing elements and means for rotating said shafts.

2. A kneading or grinding machine comprising an 0 en kneading trough, an outlet at one end 0 said trough, one or two shafts adapted to rotate in the trough,and provided with kneading or grinding elements, an upward extension on said trou h' and partition gates adjustable in vertica guiding slots in said extension, said gates reaching downward between said kneading or grlnding elements and means for rotating said shafts.

3. A kneading or grinding machine comprising an open kneading trough, an outlet at one end ofsaid trou h, one or two shafts adapted to rotate in t e trough and provided with kneading or grinding. elements,

an upward extension on said trough, parti-' tion gates vertically adjustable in two or more adjacent vertical slots in said extension and reaching downward between said kneading or grindin elements and means for rotating said sha s.

4. A kneadin or grinding machine comprising a troug one or more shafts ada ted to rotate in said trough and provi ed with kneading or grinding elements, an u ward extension on said trough, a vertically adjustable partition gate insaid extensionreaching downwardly between the kneading or grinding elements, means for ad'usting said gate laterally, and means for driving said shafts.

5. A kneading or grinding machine comprising a trough, a pair of shafts ada ted to rotate in sai trough and provide with, overlapping kneading or grinding elements, an upward extension on said trough, a artition in said trough partially surroun ing one 'of saidshafts adjacent to the kneading or grinding element on the other shaft, an

adjustable gate in said extension cooperating with said part tion, and means for driving said shafts. A

In witness whereof I have hereunto set my hand in presence of two witnesses.

CASIMIR WURSTER.

Witnesses HENRY HABPEB, WOLDEMAR Ham. 

